A plant canopy consists of a population of leaves being exposed to different light intensities and these different light intensities will determine the overall Photosynthetic rate of a plant canopy penetration. Overal plant productivity depends on the amount of collective canopy photosynthesis.
By increasing light intensity only on top of a plant canopy will provide diminishing return after the light intensity reaches a certain level. For example, if a particular strain of cannabis yields 1 pound of crop for a light level of 800 PPFD, the same strain may not yield more than 1.4 pounds for a light level of 1600 PPFD. The other negative factors are that it will require more than twice the energy to generate twice the amount of light and this intense light will most likely damage the plant leaves under the same water, nutrient, and CO₂ setup.
Plant canopy not only requires the proper amount of light on top but also on sides and inside into canopy. Various lighting strategies may be utilized including sidelights, which are cumbersome, expensive, and also inefficient.
PerfectPar™ DuoLight 4000 not only provides more light on top of the canopy but also on sides and inside into canopy and it does so by not burning leaves and consuming more energy. This is achieved by Boulderlamp’s patented technology as follows:
DuoLight 4000 balances and distributes energy intelligently. Light is usually more intense under the inner bars of a grow light array than outer bars. In DuoLight 4000, light under the inner bars is reduced to provide uniform lighting. Energy saved from reduced light creates a periodically moving light beam made of both horticultural and antimicrobial light. During the daily grow cycle, the moving light beam travels within the LED light array providing intense light on top, below and sides of the canopy where most LED grow lights never reach. Because of the moving light beam, there are no stationary light hot spots under the DuoLight 4000.
The drawing below demonstrates how light intensity increases to the sides of plants when the light in a light bar increases with a sequentially moving periodic light beam. In this case, A1 represents the distance between the light bar and the top of the plant directly under it. Assuming AL3 and AR3 are twice the distance of A1, the light will be two times more intense when the light intensity doubles at the distance A1.
The sequentially moving periodic light beams also consist of antimicrobial light acting as a prevention tool against mold and pests in all phases of a grow, vegetative and flowering, from start to finish. Antimicrobial light is made of 405nm Blue and 395nm UVA. These spectra are safe for humans. Various research demonstrated the efficacy of 405nm blue for the inactivation of an array of microbial pathogens. We expect even higher efficacy when combined with 395nm UVA.
405nm Blue and 395nm UVA antibacterial light is also an efficient photosynthetic light. This can be seen in the graph below. For example, at around 400nm, the Relative Photosynthesis Efficacy is much higher than 600nm Orange/Red.